Earlier in 90s, people were following a standard formula for setting up their systems having Windows 95 OS armed with Microsoft Word, Excel, PowerPoint and Outlook. All the programs installed on their computer were commercial. They had no idea about the concept of not paying for applications. But over the next decade, people started to realize the advantages of open sources and a gradual transformation occurred over the next few years. As the result, we can see open sources everywhere today; reason being its popularity and wide range of features.